basic stats psychology
null hypothesis testing
covers z tests and inferential statistics
a. the hypothesis indicates that there is no significant difference between means or no relationship between variables. if this hypothesis is true, any difference or relationship detected in a sample is likely due to
b. the hypothesis implies that there is a relationship between variables or a difference between means. if it is a hypothesis it will predict a specific direction of the expected relationship or difference. if it is a hypothesis, it will not predict a specific direction of the difference or relationship.

d

step-by-step explanation:

it’s supposed to be -4+45=41

step-by-step explanation:

the correct option is 2.

step-by-step explanation:

according to the given information triangle abc is a right angle triangle with right angle at a. segment ab is 5 and segment ac is 7. point d is on segment bc and angles adb and adc are right angles.

it is given that triangles abd, cad, and cba are similar.

two triangles are similar if their corresponding sides are proportional.

in triangle cba, using pythagoras theorem

                      )

triangle abd and cba are similar,

                            (2)

triangle cad and cba are similar,

                      )

using (1), (2) and (3), we get

hence proved.

therefore option 2 is correct.